Fix content, add command, update readme

app/Console/Commands/AddTweet.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Models\Thread;
+use App\Models\Tip;
+use App\Twitter\Tweet;
+use Illuminate\Support\Str;
+use Illuminate\Console\Command;
+
+class AddTweet extends Command
+{
+    protected $signature = 'tweet:add {tweet}';
+
+    protected $description = 'Add a tweet';
+
+    public function handle()
+    {
+        $id = Str::of($this->argument('tweet'))->afterLast('/')->before('?');
+
+        $this->line('Fetching tweet ID ' . $id);
+
+        $tip = Tip::fromTweet(
+            $tweet = Tweet::fetch($id)
+        );
+
+        $tip->slug = $this->ask('Slug', $tip->defaultSlug());
+
+        $tip->thread_slug = $this->choice('Thread', Thread::all()->pluck('slug', 'title')->prepend('- None - ', null)->toArray(), null);
+
+        $tip->save();
+
+        $this->info("Successfully saved tip to: content/tips/{$tip->slug}.md");
+    }
+}